CWAP-405 実際試験問題と解答 - 模擬練習 - 受験自信を増やす

Question No : 1
ABC International has installed a new smart ZigBee controlled lighting system. However, the network team is concerned that this new system will interface with the existing WLAN and has asked you to investigate the impact of the two systems operating simultaneously in the 2.4 GHz band.
When performing Spectrum Analysis, which question could you answer by looking at the FFT plot?

A.Do the ZigBee channels used by the lightning system overlap with the WLAN channels?
B.Is the ZigBee system using more the 50% of the available airtime?
C.Is the ZigBee system causing an increase in WLAN retries?
D.Is the WLAN corrupting ZigBee system messages?

正解:

Question No : 2
Which information element is a summary of the AP QoS capabilities?

A.EDCA Parameter Set
B.TSPEC
C.QoS Subfield
D.QoS Capabilities

正解:

Question No : 3
When analyzing RF information, it is often separated into two different types of domains, known as what? (Choose all that apply.)

A.Power domain
B.Frequency domain
C.Regulatory domain
D.Time domain
E.Signal domain

正解:

Question No : 4
The Long PPDU includes a -bit PLCP Preamble, which consists of a -bit Sync field.

A.144, 128
B.72, 56
C.256, 212
D.144, 72
E.128, 72

正解:

Question No : 5
Although clause 19 devices support data rates of 6, 9, 12, 18, 24, 36, 48, and 54 Mbps, the standard requires them to support only three data rates.
What are those three rates? (Choose three.)

A.6
B.9
C.12
D.18
E.24
F.36

正解:

Question No : 6
In a Spectrum Analyzer the Swept Spectrogram plot displays what information?

A.Wi-Fi Device information
B.Duty cycle in the frequency domain
C.The RF time domain
D.RF power present at a particular frequency over the course of time

正解:

Question No : 7
What are the two reasons that 802.11 radios use physical carrier sense? (Choose two.)

A.Synchronize incoming transmissions
B.Synchronize outgoing transmissions
C.Reset the NAV
D.Start the random back-off timer
E.Assess the RF medium

正解:

Question No : 8
You are using a Wireless Aggregator utility to combine multiple packet captures. One capture exists for each of channels 1, 6 and 11.
What kind of troubleshooting are you likely performing with such a tool?

A.Fast secure roaming problems.
B.Narrowband DoS attack detection.
C.Interference source location.
D.Wireless adapter failure analysis.

正解:

Question No : 9
A station is participating in a mixed-mode network and wants to transmit data. The station is configured to use CTS-to-self as its protection mechanism.
Which of the following frames are transmitted by the station? (Choose all that apply.)

A.RTS
B.CTS
C.Data
D.ACK
E.SIFs

正解:

Question No : 10
The upper portion of the Physical layer is known as the , and the lower portion is known as the.

A.PPDU
B.PMD
C.PSDU
D.PLCP
E.MSDU

正解:

Question No : 11
How does a client station indicate that it is using Power Save mode?

A.It transmits a frame to the access point with the Sleep field set to 1.
B.It transmits a frame to the access point with the Power Management field set to 1.
C.Using DTIM, the access point determines when the client station uses Power Save mode.
D.It doesn’t need to, because Power Save mode is the default.

正解:

Question No : 12
While performing a packet analysis, you periodically see some CF-End frames along with some CF-End+CF-ACK frames.
Why are these frames occurring? (Choose all that apply.)

A.These are corrupted frames.
B.You are running an IBSS network that has PCF enabled.
C.You are running a BSS network that has DCF enabled.
D.These are normal frames in a contention network.

正解:

Question No : 13
Name two reasons why 802.11 power management is considered inefficient.

A.All buffered unicast frames sent by the AP must be followed by an acknowledgment frame.
B.All buffered unicast frames sent by the AP must be preceded by a PS-Poll frame.
C.Too much protocol overhead is caused by the acknowledgment frames that follow retrieved unicast frames from the AP’s buffer.
D.Too much protocol overhead is caused by the PS-Poll frames that precede retrieved unicast frames from the AP’s buffer.

正解:

Question No : 14
During a VHT Transmit Beamforming sounding exchange, the beamformee transmits a Compressed Beamforming frame to the beamformer.
What is communicated within this Compressed Beamforming frame?

A.Steering Matrix
B.Beamforming Matrix
C.Feedback Matrix
D.Beamformee Matrix

正解:

Question No : 15
What does heuristic-based expert analysis do?

A.Collects network statistics and compares them to configured threshold values
B.Looks for patterns in the traffic flow and compares them to a set of rules
C.Automatically performs active attacks against rogue devices
D.Uses SMNP to monitor wireless infrastructure

正解:

CWNP CWAP-405 問題練習